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by hilbertseries 1247 days ago
https://en.m.wikipedia.org/wiki/Computable_number
1 comments

There are uncomputable numbers which can still be defined.

https://en.wikipedia.org/wiki/Chaitin%27s_constant

See also this Numberphile video on numbers, including algebraic, computable, transcendental, and talking about numbers beyond those.

https://m.youtube.com/watch?v=5TkIe60y2GI